[SWFLguy]

We had a JV HS pitcher here that had a bad habit of pushing her hair back
before she pitched. We told her that if she had to do it, she needed to wipe her hand on her shirt or pants before the pitch. In a perfect world, coaches would break pitchers of such things.
The worse case of foreign substance on a ball I ever had was in a men's FP tournament. The plate umpire had tossed a ball because it had pine tar or something like that on it. When it happened again, he asked me to see if I could tell how it was getting on the ball. I watched everyone and finally was able to tell that it was the 1st baseman who had some stuff on his glove and was doing it on purpose in key situations. We tossed him. He was not happy !